Sorry for any wrong spelling using my phone to type
say is what if end is natsu demon sprit
Let me explain what I mean
When inglee fought end he or someone sealed nastu evil side in a book or something else and inglee couldnt kill nastu because he was a kid or inglee know him before zeref...
There is some bad guy left and he or she might go after sasuke to get his eyes
I'm saying this because sasuke sense something then he was like it is nothing
both got sealing justu
sasuke got rinnegan and with rinnegan he could get some other Justus
naruto flying ability and truth seeking balls
I might be forgetting more but I think sasuke got more power than naruto